CN106292447B - A kind of integrated laser Level monitor with signal acquisition and transmission - Google Patents

Abstract

The invention discloses an integrated laser water level monitoring device with signal acquisition and transmission, which is characterized in that it mainly consists of a single-chip microcomputer, a signal processing unit connected to the single-chip microcomputer, a display and a wireless transmission block, and a signal processing unit connected Composition of laser water level gauge. The present invention can send the monitoring results to the monitoring site through the wireless network, so that the monitoring site can analyze the monitoring results in time, so that the water conservancy monitoring work can be carried out normally; the present invention uses the wireless network to transmit the water level signal without laying lines , greatly reducing the cost.

Description

An integrated laser water level monitoring device with signal acquisition and transmission

technical field

The invention relates to a monitoring device, in particular to an integrated laser water level monitoring device with signal acquisition and transmission.

Background technique

Water conservancy monitoring equipment is an indispensable equipment in water conservancy construction, and monitoring the water level of river channels is an indispensable part of water conservancy flood control and flood fighting work. With the development of laser technology, a laser water level monitoring device has appeared at present. The laser water level monitoring device measures the water level through laser measurement technology. It is easy to use and has high measurement accuracy, and has been widely used. However, when the current laser water level measuring device is in use, only the on-site surveyors can know the monitoring results at the first time. If they want to analyze the monitoring results, they can only analyze the monitoring results by using a computer after returning to the monitoring site. This method cannot Analyzing the monitoring results at the first time has seriously hindered the normal progress of water conservancy monitoring work. Therefore, it is a top priority to provide a laser water level monitoring device that can send monitoring results to monitoring stations in real time.

Contents of the invention

The purpose of the present invention is to solve the defect that the current laser water level monitoring device cannot send the monitoring results to the monitoring site in real time, and provide an integrated laser water level monitoring device with signal acquisition and transmission.

The purpose of the present invention is achieved through the following technical solutions: a kind of integrated laser water level monitoring device with signal acquisition and transmission, mainly consists of a single-chip microcomputer, a signal processing unit connected to the single-chip microcomputer, a display and a wireless transmission block, and signal processing The laser water level gauge connected to the unit is composed of; the signal processing unit is mainly composed of a processing chip U, a capacitor C5 whose negative pole is connected to the -IN pin of the processing chip U, and whose positive pole is connected to the +IN pin of the processing chip U. The opposite end is connected to the OUT pin of the processing chip U, and the reverse end is connected to the V+ pin of the processing chip U after passing through the resistor R13. The negative pole is connected to the V+ pin of the processing chip U, and the positive pole is connected to the power supply. Capacitor C6, the P pole is connected to the negative pole of the capacitor C5, the diode D5 is connected to the N pole and the negative pole of the capacitor C6, the positive pole is connected to the P pole of the diode D5, and the negative pole is connected to the negative pole of the capacitor C5 after passing through the resistor R11 Capacitor C4, the N pole is connected to the positive pole of the capacitor C5, the P pole is connected to the positive pole of the capacitor C4 through the resistor R9, the diode D3 is connected to the P pole of the diode D3, and the signal follower circuit is connected to the P pole of the diode D3, and one end is connected to the V of the processing chip U -The pins are connected, the other end is connected to the signal follower circuit and the resistance R12 is grounded at the same time, and the waveform adjustment circuit is connected to the reverse end of the NAND gate A1; the input end of the signal follower circuit is connected to the laser water level gauge connected; the output terminal of the waveform adjustment circuit is connected with the single-chip microcomputer.

Further, the signal following circuit is composed of field effect transistor MOS, triode VT1, triode VT2, the N pole is connected with the collector of the triode VT1 through the resistor R7, and the P pole is connected with the drain of the field effect transistor MOS through the resistor R4. Connected diode D1, the negative electrode is connected to the base of the triode VT1 after the resistor R6, the positive electrode is connected to the drain of the field effect transistor MOS, the capacitor C2, the N electrode is connected to the V-pin of the processing chip U after the resistor R12 Connected, the diode D4 whose P pole is connected to the emitter of the triode VT2 after passing through the resistor R10, the positive pole connected to the emitter of the triode VT2, the capacitor C3 whose negative pole is connected to the P pole of the diode D4, and the P pole to the P of the diode D4 The diode D2 connected to the pole phase, the N pole connected to the base of the triode VT2 after the resistor R8 is connected in series with the resistor R5 between the source of the field effect transistor MOS and the P pole of the diode D4, and the positive pole is connected to the field after the resistor R3 The gate of the effect transistor MOS is connected, the capacitor C1 whose cathode is connected to the P pole of the diode D4, and the resistor R1 whose one end is connected to the positive pole of the capacitor C1, and the other end is connected to the P pole of the diode D1 after passing through the resistor R2 The P pole of the diode D1 is connected to the power supply; the base of the triode VT2 is connected to the emitter of the triode VT1, and its collector is connected to the P pole of the diode D3; the positive pole of the capacitor C1 is connected to the laser water level gauge connect.

The waveform adjustment circuit is composed of an amplifier P1, an amplifier P2, an amplifier P3, a triode VT3, a capacitor C7 whose negative pole is connected to the positive pole of the amplifier P1, and the positive pole is connected to the reverse terminal of the NAND gate A1, and the positive pole is connected to the positive pole of the amplifier P1 , the capacitor C8 whose negative pole is connected to the output terminal of the amplifier P1, the resistor R16 connected in parallel with the capacitor C8, the N pole connected to the output terminal of the amplifier P1, the P pole connected to the negative pole of the amplifier P1 through the resistor R15, and the diode D6 , the negative pole is connected to the output terminal of the amplifier P3, the positive pole is connected to the N pole of the diode D6 after passing through the resistor R17, the capacitor C10, the negative pole is connected to the output terminal of the amplifier P2, and the positive pole is connected to the positive pole of the amplifier P2 Capacitor C9, and the resistor R14 connected in series between the base of the transistor VT3 and the positive pole of the amplifier P2; the negative pole of the amplifier P1 is connected to its positive pole, and its output terminal is connected to the microcontroller; the negative pole of the amplifier P2 is connected to the transistor VT3 The collector of the transistor VT3 is connected to the collector, and its output terminal is connected to the N pole and P pole of the diode D6 respectively; the base of the triode VT3 is connected to the reverse terminal of the NOT gate A1, and its emitter is connected to the negative pole of the amplifier P3 connected to ground at the same time; the anode of the amplifier P3 is connected to the output terminal of the amplifier P2.

The processing chip U is an LM324 integrated chip.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

(1) The present invention can send the monitoring result to the monitoring site through the wireless network, so that the monitoring site can analyze the monitoring result in time, so that the water conservancy monitoring work can be carried out normally; the present invention uses the wireless network to transmit the water level signal, There is no need to lay lines, which greatly reduces the cost.

(2) The signal processing unit of the present invention can amplify the water level signal output by the laser water level gauge, thereby making up for the loss of the water level signal produced in the wireless transmission process, making the water level signal received by the monitoring station clearer; at the same time, the The signal processing unit can also adjust the waveform of the signal to avoid distortion of the signal waveform, which greatly improves the accuracy of the water level signal received by the monitoring station; in this way, the monitoring station can better analyze the monitoring results.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a structural diagram of a signal processing unit of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

Example

As shown in Figure 1, the present invention mainly is mainly made up of single-chip microcomputer, signal processing unit, display and wireless transmission block that are connected with single-chip microcomputer respectively, and the laser water level gauge that is connected with signal processing unit. The entire water level monitoring device is set on the shore, and the laser water level gauge is vertically set on the water surface through a fixed rod. Since the laser can directly penetrate to the bottom of the water, a reflector needs to be installed on the water surface directly below the laser water level gauge. The reflection plate needs to be fixed; the setting method of the laser water level gauge and the reflection plate is a mature technology at present, so I won’t repeat it here.

The laser water level gauge adopts JH2004 laser water level gauge. When working, the laser water level gauge emits a beam of laser light. The laser beam is reflected back to the laser water level gauge by the reflector. The laser water level gauge outputs corresponding digital signals according to the phase difference between the two laser beams. Signal processing unit. The signal processing unit processes the digital signal and outputs it to the single chip microcomputer. This single-chip microcomputer is the processing center of the present invention, and it preferably adopts AT89S51 single-chip microcomputer to realize, and the P1.0 signal input pin of this AT89S51 single-chip microcomputer is connected with the output end of the signal processing unit, and its P2.0 pin is connected with the display, P2 The .2 pin is connected with the wireless transmission module. The single-chip microcomputer processes the signal and sends it to the display to display the water level value, and at the same time sends the signal to the wireless transmission module, and the wireless transmission module transmits it to the monitoring station through the wireless network. The wireless transmission module is realized by ZIGBEE wireless transmission module, and its signal input interface is connected with the single-chip microcomputer; the corresponding monitoring station also needs to be equipped with a corresponding wireless transmission module to receive the signal.

In order to better implement the present invention, as shown in Figure 2, the signal processing unit is mainly composed of a processing chip U, the negative pole is connected to the -IN pin of the processing chip U, and the positive pole is connected to the +IN pin of the processing chip U Capacitor C5, the positive terminal is connected to the OUT pin of the processing chip U, the negative terminal is connected to the V+ pin of the processing chip U after passing through the resistor R13, the negative terminal is connected to the V+ pin of the processing chip U , the positive pole of the capacitor C6 connected to the power supply, the P pole is connected to the negative pole of the capacitor C5, the N pole is connected to the negative pole of the capacitor C6, the diode D5 is connected, the positive pole is connected to the P pole of the diode D5, and the negative pole is connected to the capacitor C5 through the resistor R11 Capacitor C4 connected to the negative pole, the N pole connected to the positive pole of the capacitor C5, the P pole connected to the positive pole of the capacitor C4 through the resistor R9, the diode D3 connected to the P pole of the diode D3, and the signal follower circuit connected to the P pole of the diode D3, and one end is connected to the processing The V-pin of the chip U is connected, the other end is connected to the signal follower circuit and the resistance R12 is grounded at the same time, and the waveform adjustment circuit is connected to the reverse end of the NAND gate A1. The input end of the signal following circuit is connected with the laser water level gauge; the output end of the waveform adjustment circuit is connected with the single-chip microcomputer

The processing chip U, the capacitor C4, the resistor R11, the capacitor C5 and the diode D3 form an amplifying circuit, which can amplify the water level signal without distortion, thereby compensating for the weakening of the water level signal due to wireless transmission. In order to better implement the present invention, the processing chip U is preferably realized by using an LM324 integrated chip.

Among them, the signal following circuit consists of field effect transistor MOS, transistor VT1, transistor VT2, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, resistor R8, resistor R10, capacitor C1, capacitor C2 , capacitor C3, diode D1, diode D2 and diode D4.

When connected, the N pole of the diode D1 is connected to the collector of the triode VT1 through the resistor R7, and the P pole is connected to the drain of the field effect transistor MOS through the resistor R4. The negative pole of the capacitor C2 is connected to the base of the triode VT1 through the resistor R6, and the positive pole is connected to the drain of the field effect transistor MOS. The N pole of the diode D4 is connected with the V-pin of the processing chip U after passing through the resistor R12, and the P pole is connected with the emitter of the triode VT2 after passing through the resistor R10. The anode of the capacitor C3 is connected to the emitter of the triode VT2, and the cathode is connected to the P pole of the diode D4. The P pole of the diode D2 is connected to the P pole of the diode D4, and the N pole is connected to the base of the triode VT2 after passing through the resistor R8. The resistor R5 is connected in series between the source of the field effect transistor MOS and the P pole of the diode D4. The anode of the capacitor C1 is connected to the gate of the field effect transistor MOS through the resistor R3, and the cathode is connected to the P pole of the diode D4. One end of the resistor R1 is connected to the positive pole of the capacitor C1, and the other end is connected to the P pole of the diode D1 after passing through the resistor R2. The P pole of the diode D1 is connected to the power supply. The base of the triode VT2 is connected to the emitter of the triode VT1, and its collector is connected to the P pole of the diode D3. The positive pole of the capacitor C1 is connected with the laser water level gauge. The signal following circuit can ensure the stability of the input water level signal.

The waveform adjustment circuit is composed of amplifier P1, amplifier P2, amplifier P3, transistor VT3, resistor R14, resistor R15, resistor R16, resistor R17, capacitor C7, capacitor C8, capacitor C9, capacitor C10 and diode D6.

Wherein, the negative pole of the capacitor C7 is connected to the positive pole of the amplifier P1, and the positive pole is connected to the reverse terminal of the NAND gate A1. The positive pole of the capacitor C8 is connected to the positive pole of the amplifier P1, and the negative pole is connected to the output terminal of the amplifier P1. Resistor R16 is connected in parallel with capacitor C8. The N pole of the diode D6 is connected to the output terminal of the amplifier P1, and the P pole is connected to the negative pole of the amplifier P1 after passing through the resistor R15. The negative pole of the capacitor C10 is connected to the output terminal of the amplifier P3, and the positive pole is connected to the N pole of the diode D6 after passing through the resistor R17. The negative pole of the capacitor C9 is connected to the output terminal of the amplifier P2, and the positive pole is connected to the positive pole of the amplifier P2. The resistor R14 is connected in series between the base of the transistor VT3 and the anode of the amplifier P2.

The negative pole of the amplifier P1 is connected with its positive pole, and its output terminal is connected with the single-chip microcomputer. The cathode of the amplifier P2 is connected to the collector of the transistor VT3, and its output terminals are respectively connected to the N pole and the P pole of the diode D6. The base of the triode VT3 is connected to the reverse terminal of the inverter A1, and its emitter is connected to the negative terminal of the amplifier P3 and grounded at the same time. The anode of the amplifier P3 is connected to the output terminal of the amplifier P2.

The waveform adjusting circuit can process the waveform of the water level signal to improve the stability of the water level signal, and the waveform adjusting circuit can make the waveform distortion of the water level signal less than 0.2%. The capacitor C8 and the resistor R16 form a low-pass filter, which can filter high-frequency interference, further improve the stability of the water level signal, and facilitate long-distance transmission of the water level signal.

The invention uses a signal processing unit to amplify and process the water level signal output by the laser water level gauge, thereby making up for the loss of the water level signal in the wireless transmission process and making the water level signal received by the monitoring station clearer. At the same time, the signal processing unit also adjusts the waveform of the signal to avoid distortion of the signal waveform, which greatly improves the accuracy of the water level signal received by the monitoring station. In this way, the monitoring site can better analyze the monitoring results.

As described above, the present invention can be well realized.

Claims (4)

1. a kind of integrated laser Level monitor with signal acquisition and transmission, it is characterised in that：Mainly by microcontroller, Signal processing unit, display and the wireless transmission block being connected respectively with microcontroller, and be connected with signal processing unit Laser water-level gauge composition；Mainly by processing chip U, cathode is connected the signal processing unit with the-IN pins of processing chip U It connects, the capacitance C5 that anode is connected with+IN the pins of processing chip U, forward end is connected, instead with the OUT pins of processing chip U The NOT gate A1 being connected to end with the V+ pins of processing chip U after resistance R13, cathode are connected with the V+ pins of processing chip U It connects, the positive capacitance pole C6, P for connecing power supply is connected with the cathode of capacitance C5, the diode that the poles N are connected with the cathode of capacitance C6 D5, anode be connected with the poles P of diode D5, the poles capacitance C4, N that cathode is connected after resistance R11 with the cathode of capacitance C5 It is connected with the anode of capacitance C5, the diode D3 that the poles P are connected after resistance R9 with the anode of capacitance C4, with diode D3's The signal that the poles P are connected follows circuit, and one end is connected with the V- pins of processing chip U, the other end and signal follow circuit phase The Waveform adjusting circuit composition that the backward end of the resistance R12 and NAND gate A1 that are grounded while connection are connected；The signal The input terminal of circuit is followed to be connected with laser water-level gauge；The output end of the Waveform adjusting circuit is connected with microcontroller.

2. a kind of integrated laser Level monitor with signal acquisition and transmission according to claim 1, special Sign is：The signal follows circuit by field-effect tube MOS, triode VT1, the triode pole VT2, N after resistance R7 with three poles The diode D1 that the collector of pipe VT1 is connected, the poles P are connected after resistance R4 with the drain electrode of field-effect tube MOS, cathode is through electricity It is connected with the base stage of triode VT1 after resistance R6, the positive poles capacitance C2, N being connected with the drain electrode of field-effect tube MOS are through resistance It is connected with the V- pins of processing chip U after R12, two poles that the poles P are connected after resistance R10 with the emitter of triode VT2 Pipe D4, anode be connected with the emitter of triode VT2, the capacitance pole C3, P and two that cathode is connected with the poles P of diode D4 The diode D2 that the poles P of pole pipe D4 are connected, the poles N are connected after resistance R8 with the base stage of triode VT2 concatenates scene effect Resistance R5 between the source electrode of pipe MOS and the poles P of diode D4, anode are connected after resistance R3 with the grid of field-effect tube MOS It connects, the capacitance C1 that cathode is connected with the poles P of diode D4 and one end is connected with the anode of capacitance C1, the other end is through electricity The resistance R1 compositions being connected with the poles P of diode D1 after resistance R2；The poles P of the diode D1 connect power supply；The triode VT2 Base stage be connected with the emitter of triode VT1, its collector is connected with the poles P of diode D3；The capacitance C1 is just Pole is connected with laser water-level gauge.

3. a kind of integrated laser Level monitor with signal acquisition and transmission according to claim 2, special Sign is：The Waveform adjusting circuit is by amplifier P1, amplifier P2, amplifier P3, triode VT3, cathode and amplifier P1 Anode be connected, the capacitance C7 that the backward end of positive NAND gate A1 is connected, anode is connected with the anode of amplifier P1, bears The capacitance C8 that pole is connected with the output end of amplifier P1, the resistance pole R16, N being in parallel with capacitance C8 are defeated with amplifier P1's The diode D6 that outlet is connected, the poles P are connected after resistance R15 with the cathode of amplifier P1, cathode are defeated with amplifier P3's The capacitance C10 that outlet is connected, anode is connected after resistance R17 with the poles N of diode D6, the output of cathode and amplifier P2 The capacitance C9 that end is connected, anode is connected with the anode of amplifier P2, and it is serially connected in the base stage and amplifier of triode VT3 Resistance R14 compositions between the anode of P2；The cathode of the amplifier P1 is connected with its anode, its output end then with microcontroller It is connected；The cathode of the amplifier P2 is connected with the collector of triode VT3, its output end is then respectively with diode D6's The poles N are connected with the poles P；The backward end of the base stage NAND gate A1 of the triode VT3 is connected, its emitter then with amplifier P3 Cathode be grounded while be connected；The anode of the amplifier P3 is connected with the output end of amplifier P2.

4. a kind of integrated laser Level monitor with signal acquisition and transmission according to claim 3, special Sign is：The processing chip U is LM324 integrated chips.